| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [adv] [pron] [modal v] | 997 |
|
| 2 | [verb] why [pron] [modal v] | 522 |
|
| 3 | [vb past] [Wh adv] [pron] [modal v] | 227 |
|
| 4 | [vb past] why [pron] [modal v] | 30 |
|
